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Concave mirror is a concave optical glass lens plated with protected metalic coating or dielectric coating on the curved surface. Generally, ubstrate are made from Optical BK7/K9, B270, Fused Silica and Corning 7980 glass.
As all we know, there are four coating system for a mirror. How to select the most ideal one? Here're our opinions for as bellow:
1. For visible full-reflevtion, we strongly recommend dielectric coating. Especially a single wavelength in the range of 400-700nm, we could offer an excellent reflectivity up to 99.5%.
2. Aluminum coating is also widely used for 400-700nm visible spectrum, but it delivers a low relflection, around 85%. However if you are about to operate a wide range without strictly reflection, Aluminum is a cost-efficient choice.
3. Silver coating has better reflectivity than Aluminum, could make a reflectivity more than 95% at a wide range, even at SWIR.
4. As for Gold coating, it's more expensive. Also, offers higher reflectivity than other matal coating. It's widely used in high power laser system which needs less energy loss.
Wecan also deposit UV enhanced Aluminum coating and Copper coating according to your special demands.
For further questions, please feel free to contact our sales engineer at sales@wheo.cn.
More size and shape is available. If we have stock, sample is also OK.
Material | BK7, JGS1, Aluminum, Silicon |
Coating | Aluminum, Silver, Gold, dielectric coating |
Reflection | >95% |
Diameter Tolerance | +0.0/-0.1mm |
Thickness Tolerance | ±0.1mm |
Clear Aperture | >= 90% Diameter |
Surface Flatness | lamda/4 at 632.8nm |
Parallelism | <1' |
Bevelling | <0.2×45° |



a: Dimesion size : 5-300mm , thickness up to customer requirements
b: Many material could be choosed, like BK7, Fused Silica, Sapphire, MgF2, CaF2, Ge, Si, Znse, ZnS and so on.
c: AR HR DLC coating or as your request
For more please visit our website: www.wheo.cn
We can design optical components according to your requirements.
Our current production capacity includes but not limited to cutting, grinding, polishing,coatin and testing.
Packing Details: Protective film or Capacitor paper,Pearl cotton,Cardboard box.
Delivery Details: 7 days for stock.
3-4 weeks for custom-made products for sample.
in common, 4 weeks for mass production

Are you factory or trader?
We're factory, engaged in optics manufacturing for over 10 years.
How to pay?
We usually draft Trade Assurance Order on Alibaba, you can pay by the most convenient way which also protect your rights.
What's the deliver time?
For inventory: the delivery time is around 5 workdays.
Customized products: the delivery time is 10 to 30 workdays, according to the quantity and precision.
How to ensure the safety of payment?
Wuhan Especial Optic is the gold supplier and supports Alibaba Trade Assurance. Payment<=5000USD, 100% in advance. Payment>5000USD, 50% T/T in advance, balance before shippment.
Can I customize the products based on my need?
Sure, we can customize all optical components based on your uique needs.
How do you ship goods?
Typically FedEx, UPS, DHL, TNT, EMS or upon request.

Wuhan Especial Optic Inc.
Contacts: David Liu
T: 86-027-87504830
P: +86 18622556450
Skype: +86 18622556450
Email: David(at)wheo.cn
Website: www.wheo.cn
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